MCQGeeks
CBSE
JEE
NTSE
NEET
English
UK Quiz
Quiz
Driving Test
Practice
Games
Quiz
Science
Work Power And Energy
Quiz 3
Solution
Q.1.
Simple machines make work easier by increasing what?
The distance over which work is done
The force needed to do work
The time required to do work
The acceleration of a massive object
Q.2.
What effect do external forces like an applied force, friction force, or drag force have?
They have no effect on a system's mechanical energy.
They convert kinetic energy into potential energy.
They convert potential energy into kinetic energy.
They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system.
Q.3.
A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much work did they do climbing the stairs?
400 J
1200 J
200 J
120 J
Q.4.
How high up is a 3200-kg plane if it hasJ of potential energy?
10 m
30 m
307200000 m
300 m
Q.5.
What effect do external forces like an applied force, friction force, or drag force have?
They have no effect on a system's mechanical energy.
They convert kinetic energy into potential energy.
They convert potential energy into kinetic energy.
They convert between mechanical energy and other forms of energy to change the total mechanical energy of the system.
Q.6.
If a 1300-kg car has been lifted so it hasJ of potential energy, it was lifted up ---.
1.5 m
150 m
15 m
0.67 m
Q.7.
How does conservation of energy explain why something that is falling should speed up?
It gains kinetic energy because it gains potential energy.
It loses kinetic energy because no work was done on it.
It gains kinetic energy because it loses potential energy.
It loses kinetic energy because the Earth gains potential energy.
Support mcqgeeks.com by disabling your adblocker.
×
Please disable the adBlock and continue.
Thank you.
Reload page